impbovemest ik lamps



e lap on each edgc,vas'shoivn in gs. 4 and 5, so that the said edges become rounded and smooth', and become of double thickness, whereby the projection b will slideiu the slot with less friction, and whereby-'the Wick-tube' A is made stronger and more stift' than with those of the ordinary construction. E represents the ordinary chimney-holder and airlcond'uetonuhic'h is secured upon the` tube I", and the tn be F is secured to the wick-tube A, it having au inward-projecting flange, c, fitting around tho'wiclr-tube A, which flange c rests upon the ordinary oil-tube G, uponV and over which lthe tube is loosely fitted, so that by turning the chimney-holder F the wick is raised vor lou'ered. By means of the tube F and inward-.projecting flange the wick-'tube A is malle stronger and stiffer. Non', in order to prevent the 'oil irhcnfurnished in surplus to the flame from wasting over thewick-tube'A and over the tubes F and G doivnuinto the'usual waste-cup, I provide a. flange, K, around the top edge of the wick-tube, as shown in 3, and extend the slot B to the extremity of the said top edge. The wasting ofthe oil, if in surplus furnished, is thereby stopped and consumed. Openings may be'made to tarn the oil back on the wick again, but I prefer having the'ririg fittedtight, as it prevents4 the lamp from getting on fire, also preventing the flame from coming in contact with theru'iek-tube andheating the burner.

To prevent an ovcrllop' on the inside of the top edge of the wick, I contract the pipe D on its upper edge, so as to form a space between the wick andthe tubo or pipe D; The groove d extending thereto renders passage to run the surplus oil downwards to theu'ick, l and in that mannerstops its overflow Vdown intothe waste-cup. By these means the oil is preventied from filling the waste-cup too rapidly, und the usual constant attention upon the waste-cup is dispensed with.

i -'It will be perceived that the tube F is 'united with the wick-tube by means of an inward flange meeting the periphery of the said iviek-tubexvith tight joint, whereby the vapors rising from tho'il' in the oil-tube G are prevented from escaping between .the saidtubes to catch fire frpm thollame of the lamp, therchy-enabliiig the user ofthe lamp to 'apply light-gravity oils. 1

In lamps'in which a lotwick is employedjbs shown in iig. 6, the liange K on the outside ol' the wick-answers all purpose, andy instead o t' having theV slot B to Serve as a passage from the flange -to thev wick, other-slmpod openings may be used, such as shown at ain 6. v

L represents the ordinary movable oil-cistern used in theA uocalletl `studylemp, which is inverted in order to ill it, and I is the eistern which supplies the oiLtube G ofthe lauip. The oistern L is provided with a. valve, for thepurpose of closing the aperture through which it is filled when itis to be replaced in the ciste'rn` I. vThe said valves, having a stem which strikes upon the bottoni of the cistern I, provides for the raising of lthe Iva'lfvc when the' cistern L is restored to itspropcr position when in use, se as to allow the oil from said cister'n L to flow into the eist'ern I until the oil in the last-nametl` eistern` rises above the aperture of the cistern L, whereby the supply of 'air required in the cistern L, to allow the oil to llow from it, is stopped. The oil in the cisterln I being under ordinary atmospheric pressure, as well vasthat in the 'tube G, usisoon as the flame of'tbe'lamp con sumes thel oil from the wick, the same is replaced from vthe cistern I, and the level of the oil in that cistern is loivered until the air iu the oistrn I has an opportunity to llowthrough thoaperturo in the cistern L, into the eistern I, ivhereu'ppn a fresh supply of oil Hows from the cistern into the cistern I. i

In the ordinary lmnp the air enters under the edge of the pipo M, andthe levelol the oil in the cistern I is lowered considerably below said edge before an entrance is made for the air, on account ofthe end offtho pipe acting with a capillary attraction on the oil, and -therefore when the'airenters, it rushes in the pipp in large bubbles, when the column of oil held by capillary atti-action between the level of the cistern'nnd the end ofthe pipe breaks, thus causing heavy vibrations in-bgth cistcrns and in the flame. v v

Non', for the `purpose of preventing tho heavy vibrations of the'llamc above stated, I provide openings ef, shown in lig-1, in the side of the entrance-pipo .M of the upper isternL, of jwhichl make the opening' c of o diameter only sufficient to furnish air i'n the cistcrn L,to 'give oil to the lower eistcrn I of the quantity con tinuously required by the consumption of a proper ianie4 tolgive good light when used for wor-king with it, ,and locate tliis opening immediately above the lower cdgeof the` pipeM, and of which I make the openingfona level immediately abovethe-opcning c, and of diameteronly suilioicnt for furnishing a. continuous Home sul'- ieient for a night-light. By these means the air passes int-o'tlie cistern L in small bubbles,` amldocs not. cause 'heavy vibrations of the flame 'of the lamp. Y f

Having fully-described my improvements, what I claim, and desire to secure by Letters Ifatent, is"

' 1. Theround pick-tube A, provided with a flange, K, on its outside, Aand a passage, B, in combination with the worm-pipe' D, A constructed u'ithnn inward flange at its top, substantially as herein shown, and forvtho purposes 1escrihed.,v

- 2. Constructing the wiekftnbc A with a. slot, B, made'n thcinonner and for the purpose substantially as herein shown. i i

' 3. Providing the two openings e and f on the tube M, arranged, in relation to each other, substantially as und for the purpose herein set forth.'

4. The construction-and arrangement of the top edgoof the spiral tube D, being below' the odge of the'tubo A, for the purpose of preventing tho llame reaching the tubo D and lieatingthe burner, substantially as herein shown. y 'Y ,5. The tubo F, tightly jointed, enduniting with tht; ivickftiibo A, substantially'as snd`for thepurpose ierein described.

W, H. SMITH. Witnesses:` j I '(fzzo. A. Sionsoourn,

CEAS. T. Benni. 

